\begin{equation*}
  \xymatrix{
    A & B
  }
\end{equation*}

\begin{flushright}
  \begin{tabular}{@{}p{.4in}p{2.1in}@{}}
    Signed: & \hrulefill \\
            & Krishnakumar Gopalakrishnan \\
            & July 24, 2019\\
            & London, United Kingdom \\
  \end{tabular}
\end{flushright}
